The author refers to the ocean bottom as a "frontier" in Paragraph 1 because it ______. The word "inaccessible" underlined in P

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问题 The author refers to the ocean bottom as a "frontier" in Paragraph 1 because it ______.
The word "inaccessible" underlined in Paragraph 1 is closest in meaning to ______.

选项 A、unrecognizable
B、unreachable
C、unusable
D、unsafe

答案B

解析 由题干中的“inaccessible”underlined in Paragraph one定位到原文首段第二句Until about a century ago, the deep-ocean floor was completely inaccessible,hidden beneath waters averaging over 3600 meters deep.[精析] 语义理解题[考频:37]。本题考查inaccessible一词的意思。文中第一句指出海底是个尚未开发的大片领域,第二句接着说,直到一个世纪前,海底还是完全无法靠近的地方。inaccessible“不能进入的,不能见到的;不能接近的;不能亲近的”。由此得出B)为正确答案。[避错] A)不受认可的,C)不可用的,D)不安全的,这三项的意思放在此处都不合适,故都可排除。
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